A pilot on a space ship moving at 0.86c away from the Earth sends a laser beam signal to Earth.

(a) The pilot measures the speed v of the laser beam signal to be

(A) v

(C) v > c.

(b) The people on Earth measure the speed y of the laser to be

(A) v

(C) v > c.

(a)
The correct option is (B) v = c.
A pilot on a space ship moving at 0.86c away from the Earth sends a laser beam signal to Earth. Light wave is an electromagnetic wave. Its value will be same irrespective of the frame reference. Therefore the pilot measures the speed v of the laser beam signal to be equal to the speed of light c. From the above observation we conclude that, option (B) is correct.
(b)
The correct option is (B) v = c.
A pilot on a space ship moving at 0.86c away from the Earth sends a laser beam signal to Earth. Light wave is an electromagnetic wave. Its value will be same irrespective of the frame reference. Therefore, the people on Earth measure the speed v of the laser beam signal to be equal to the speed of light c. From the above observation we conclude that, option (B) is correct.